Skin darkening after the onset of menstruation can sometimes be linked to hormonal changes, especially if it is accompanied by rapid weight gain or appears mainly around the neck, underarms, or other skin folds. According to Dr. Vasundara Cheepurupalli, these changes may be associated with conditions such as Polycystic Ovary Syndrome (PCOS), which requires timely medical evaluation.

Parents should also observe whether the pigmentation is localized or affects the entire body, and watch for other symptoms that may indicate a hormonal imbalance. If PCOS or other hormonal conditions are ruled out, consulting a dermatologist can help identify other possible causes and appropriate treatment.

Early evaluation and timely medical advice can help address the underlying cause and support your child's overall health.